Home / 78,069.28-117,103.65-18,904.90

Finding the Fourth Proportional to 78,069.28, 117,103.65 and 18,904.90

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Solution

The fourth proportional to 78,069.28, 117,103.65 and 18,904.90 is: 28,357.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,069.28 : 117,103.65 = 18,904.90 : x
  2. Step 2: Convert to fraction form
    78,069.28/117,103.65 = 18,904.90/x
  3. Step 3: Cross multiply
    78,069.28x = 117,103.65 × 18,904.90
  4. Step 4: Simplify right side
    78,069.28x = 2,213,832,792.89
  5. Step 5: Solve for x
    x = 2,213,832,792.89/78,069.28
  6. Step 6: Final answer
    x = 28,357.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.